save project

snake.py

@@ -61,10 +61,14 @@ while True:
         num2 = random.randint(1, 16)
         apple_x = 30*num1 - 30
         apple_y = 30*num2 - 30
+        score += 10
+
     else:
         position.pop(0)
+        
 
-    
+    if x < 0 or x > 630 or y < 0 or y > 450:
+        exit()
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去